一种光纤光栅色散测量方法的探讨

EXPLORATION ON A KIND OF MEASUREMENT SCHEME FOR THE DISPERSION OF FIBER GRATINGS

本文基于均匀周期布拉格光纤光栅之间的耦合波方程 ,分析了光纤光栅的反散和色射特性 ,利用光纤光栅中能量守恒特性和其电磁场所满足的哈密顿系统求得色散系数与反射率之间的关系 ,从而提出了一种先利用光谱仪测量光纤光栅反射谱 。

The quality of fiber grating dispersion and reflection was analysed based on the coupled wave equation of uniform cycling Bragg fiber gratings. Conservation of electronic and magnetic quantities and Hamiltonian system were made use of to get the relationship between the dispersion and reflection coefficients. A simple measurement scheme for fiber grating dispersion was thus obtained by first measuring fiber grating reflective spectrum with a spectrometer, and then obtaining the dispersion coefficient of fiber grating through calculations.